A Series Circuit Consists of a 10 $\Omega$ Resistor, a 20 $\Omega$

question 7

Multiple Choice

A series circuit consists of a 10 $\Omega$ resistor, a 20 $\Omega$ resistor, and a 30 $\Omega$ resistor. The circuit is connected to a 120 V source. If the voltage across the 10 $\Omega$ resistor measures 20 V and the voltage across the 30 $\Omega$ resistor measures 60 V, how much voltage should be measured across the 20 $\Omega$ resistor?

• A) There is not enough information given to solve this problem.
• B) 120 V
• C) 40 V
• D) 10 V

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Definitions:

Voltage Difference

The difference in electric potential between two points in an electrical circuit.

Dielectric

A non-conducting material that can be polarized by an external electric field, commonly used as an insulating material between conducting surfaces.

Metal Conductors

Materials that allow the flow of electrical current due to their free electron movement.

Insulating Material

Materials that hinder the flow of electric current, used to protect against electrical shocks and to contain electrical wiring.